我曾经开发了一个简单的路由协议，路由建立后就用traceroute查看路由情况。另外，如果要想发现多播站是否在局域网内，也可一个根据traceroute的ttl返回值判断。-I have developed a simple routing protocol, routing after the establishment of routing with traceroute to view the situation. In addi